Storage battery venting means



-March28,1939. H. CANTON. 2,152,240

I STORAGE BATTERY VENTING MEANS Filed Oct. 22, 1934 INVENTOR I HumZreri aafli onz; v 75 BY ATTORNEY Pinned 28,1939

UNITED STATES PATENT oFFicE 2.152.840 sroncamnna! vnu'rmo mus llllmllertcanb USLBaM'! Paris, France. auigno Corporation. Niagara N. 1., a corporation New York l Application Octcber 22, 1934, Serial No. 749,384 Y cum. (01. 136-177) a v The present invention relates tostorage battery construction andmore particularly to a novel meansiorventing storagebatterycells.

Itiswell known thataaecondarybattery cell 5 mustbeprovidedwithmeanstopermitolthe egress oi gases formed in the cell during itsnormal operation, It is also well knownthat it is desirable to remove from the escaping gases aw electrolyte which may be entrained therein to prevent the circuiting of the batteryand corrosion of metal parts on the exterior thereof. --The present invention resides princi-f pally in the provision of an improved means for accomplishing theseresults which, because of extreme shnphmty oi designand construction,

may be mamitachired-ccnveniently and economically and which may be readily securedin operating v A better understanding of. theinvention may n biggie;- hy reierence to the annexed drawing Figure '1 a a sectional elevational view of a portion of a storage battery cell embodying one form of the invention.

taken on the iine i2- -2 of Figure 1.

Figure 3 .is a perspective view of one form of the improved vent plug.

Referring to the drawing, referencenumeral' ll indicates generally a. storage battery cell having 25 Figure 2 is-a top plan view, partially in'sectioni.

a cover H which is sealed in theusual manner by sealing compound ii! to prevent the escap oi electrolyte irom the cell. Cover H is provided with a apertin'e-it which. is threaded for a. portion oi its Adjacent its'lower and aperture is a reduced in to provide an annular ledge 94. termed on the upper surieoe pi cover ii is a boss it which'is concentric with aperture 49 tance therefrom.

- specially constructed vent plug, indicated by the numeral it, and which will now be described in detail. The pins connsts oi an annular. top pertion ll, having a depending integrally formed skirt ll of reduced diameter. The outer surface of said skirt is provided with screw threads J9. Portion ii is apertured as indicated by 20,; and at a point preferably diametrically opposite 'said 5 aperture threads I8 are splitor. broken to form a vertical slot 22. g The parts are so proportioned that when the plug is secured in position by engagement of screw threads it with those iormed in the wall I; of apertia'e is the under surface of the outer is andspacedashort dis enema-c iii is adapted as closed by gases-condenses therein and drains back into the cell.

the possibility of the battery being shortwithout the confines oi skirt Ilrather than being lower end or skirt is.

portion of member I1 is brought into contact with, the upper surface-oi boss I! and caused to beartightly thereagainst; Skirt I8 is of such length um its lower end terminates a short disvtauce above ledge ll.

Looking at Figure ill; will be noted that with the vent plug in position in the cell cover an annular groove or passage way 23 is formed between boss I5 and skirt I. which is completely-. closed with the. exceptions of slot 22 which aflords 1o 'access thereto from the interior of cell l0, and

aperture 20 which extends therefrom to the atmosphere. I

The operation oi'my' device will now be readily apparent. Gases formed during the operation of the cell escape from the interior thereoi=- through slot 22 to passageway '23, and irommassageway' 23 through aperture '20 to the atmosphere.- Passageway 23 constitutes in eflect a condensing chamber. Any moisture entrained in the escap- As the gasesarein a substantially dry condition when they reach the atmosphere,

circuited, and 01 the links and posts becoming corroded. by electrolyte escaping through the vent is reduced to a minimum.

The use ofmy venting arrangement obviates the necessity of employing baflles and other parts u or other suitable material'on ledge M, which disc, obviously, would be held in position by the [n the foregoing I have described one form of my invention Many modifications will occur to'those skilled in the art. It is'the intent that this patent shall cover all such modiflcations'as fall within the scope of. the appended claims.

Having duly described my invention, I claim: 1. Venting means for storage battery cells com- .prising a celli'cover havinga filling aperture therein and having a boss concentric with and spaced from said aperture, a vent plug having a depending skirt portion of reduced diameter in i i contact with the wall of said aperture and having an enlarged top portion resting on said boss to form an enclosed condensing chamber above the upper surface of said cover, a portion of the outer surface of said skirt portion being slotted to permit the egress of gases from the interior of said cell to said condensing chamber, and another portion of said vent plug being provided with an aperture in direct communication. with said chamber to permit said gases to escape directly from said condensing chamber to. the atmosphere, said last named aperture and said slot being out of register with each other. i

'2. Venting means for storage battery cells comprising a cell cover having a filling aperture therein, a boss concentric with and spaced from said aperture, a vent plug having an enlarged top portion in contact with the upper sm'face of said boss to form an enclosed condensing chamber, and a reduced skirt portion engaging the wall of said aperture, the outer surface of said skirt 1 being slottedto permit the escape of gases from said cell to said condensing chamber, said enlarged top portion being provided with an aperture in direct communication with said chamber and out of registry with said slot to permit said gases to escape directly from said condensing chamber to the atmosphere.

3. Venting means for storage battery cells comprising a cell cover having an aperture and having a boss concentric with and spaced from said aperture, a vent plug having an enlarged overhanging top portion in tight engagement with said boss to form an enclosed condensing chamber, and a reducing portion engaging the wall or said aperture, the outer surface of said skirt portion being slotted to permit the escape of gases from said cell to said condensing chamber, said enlarged top portion being provided with an aperture in direct communication with said chamber and out of registry with said slot to'permit said gases-to escape directly from said condenslng chambertothe atmosphere.

4, In combination with a storage battery cell cover having a filling aperture therein, and having a boss on its upper surface concentric with, and spaced from said aperture, a vent plug engaging the wall of said aperture to close the same and having an enlarged top portion in contact with said boss which, in conjunction with said boss and said cover, forms a condensing chamber,

said vent plug having m'eans ailording communication from the interior-of said cell to said condensing chamber and means but of registry with said first named means affording communication from said condensing chamber directly to the atmosphere, said condensing chamber being completely closed except for said com municating means.

5. In combination with a storage battery cell cover having a filling apertln'e therein and having a boss formed on its upper surface concentric with and spaced from said aperture, a vent plug having a reduced depending skirt portion engaging the walls of said aperture to close the same, 'and'an enlarged top portion engaging said boss to form-in conjunction with said boss and said cover a condensing chamber, said condensing chamber beingpositioned above the top of said cover and without the confines of said plug, a portion of the outer surface of said skirt being slotted to permit gas es formed in the cell to 110W into said condensing chamber between the outer 

